Aside from readability issues, I like this map, but I would consider adding a nebula background or a little bit of colours here and there among the stars, like gaseous formations or different kind of coloured stars (you already have a little nebula but it’s kind of dull); and I think some stars could be bigger and /or brighter. Beware, I don't really know what I'm talking about , not having done a star map yet, but I think more colours and more variations could improve an already good map.